from flask import g
from flask import request
from flask import session, jsonify

from info import redis_store
from info.models import User, News, Category
from info.modules.index import index_blue
import logging
from flask import current_app,render_template

from info.utils.commons import user_login_data
from info.utils.response_code import RET

# 首页新闻列表

# 请求路径: /newslist
# 请求方式: GET
# 请求参数: cid,page,per_page
# 返回值: data数据

@index_blue.route('/newslist')
def newslist():
    """
    1. 获取参数
    2. 参数类型转换
    3. 分页查询
    4. 获取到分页对象中的属性,总页数,当前页,当前页的对象列表
    5. 将对象列表转成字典列表
    6. 携带数据,返回响应
    :return:
    """
    # 1. 获取参数
    cid = request.args.get("cid","1")
    page = request.args.get("page","1")
    per_page = request.args.get("per_page","10")
    # 2. 参数类型转换
    try:
        page = int(page)
        per_page = int(per_page)
    except Exception as e:
        page = 1
        per_page = 10

    # 3. 分页查询
    try:
        """
        #判断新闻的分类是否为1
        if cid == "1":
            paginate = News.query.filter().order_by(News.create_time.desc()).paginate(page,per_page,False)
        else:
            paginate = News.query.filter(News.category_id == cid).order_by(News.create_time.desc()).paginate(page,per_page,False)
        """

        """
        # 改装,判断新闻的分类是否为1
        filters = ""
        if cid != "1":
            filters = (News.category_id == cid)
        paginate = News.query.filter(filters).order_by(News.create_time.desc()).paginate(page, per_page, False)
        """

        # 改装,判断新闻的分类是否为1
        filters = [News.status == 0]
        if cid != "1":
            filters.append(News.category_id == cid)
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page, per_page, False)

    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="获取新闻失败")

    # 4. 获取到分页对象中的属性,总页数,当前页,当前页的对象列表
    totalPage = paginate.pages
    currentPage = paginate.page
    items = paginate.items

    # 5. 将对象列表转成字典列表
    news_list = []
    for news in items:
        news_list.append(news.to_dict())

    # 6. 携带数据,返回响应
    return jsonify(errno=RET.OK, errmsg="获取新闻成功", totalPage=totalPage, currentPage=currentPage, newsList=news_list)



@index_blue.route('/',methods=['GET','POST'])
@user_login_data
def show_index():

    # #1.获取用户的登陆信息
    # user_id = session.get('user_id')
    #
    # #2.通过user_id取出用户对象
    # user = None
    # if user_id:
    #     try:
    #         user = User.query.get(user_id)
    #     except Exception as e:
    #         current_app.logger.error(e)

    #3.查询热门新闻,根据点击量,查询前十条新闻
    try:
        news = News.query.order_by(News.clicks.desc()).limit(10).all()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR,errmsg='获取新闻失败')

    #4.将新闻对象列表转成字典列表
    news_list = []
    for item in news:
        news_list.append(item.to_dict())

    #5.查询所有的分类数据
    try:
        categories = Category.query.all()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR,errmsg='获取分类失败')

    #6.将分类的对象列表转成,字典列表
    category_list = []
    for category in categories:
        category_list.append(category.to_dict())


    #3.拼接用户数据,渲染页面
    data = {
        #如果user 有值返回左边的内容 ，否则返回右边的值
        'user_info':g.user.to_dict() if g.user else "",
        'news_list':news_list,
        'category_list':category_list
    }

    return render_template('news/index.html',data=data)

#处理网站logo
@index_blue.route('/favicon.ico')
def get_web_logo():
    return current_app.send_static_file('news/favicon.ico')


#统一的返回404页面
@index_blue.route('/404')
@user_login_data
def page_not_found():
    data = {
        'user_info':g.user.to_dict() if g.user else ""
    }
    return render_template('news/404.html',data=data)